2-Amino-6-chloro-4-nitrophenol diazotization, and 5-Hydroxynaphthalene-1-sulfonic acid (0.61 Moore) and 4-(3-Methyl-5-oxo-4,5-dihydropyrazol-1-yl)benzenesulfonic acid (0.39 Moore) coupling.
Properties and Applications
red light brown. Soluble in water for bordeaux red, slightly soluble in alcohol. In concentrated sulfuric acid to red light brown, dilution after brown light wheat color precipitation. Dye aqueous solution to join concentrated hydrochloric acid for brown light orange, Join concentrated sodium hydroxide solution for orange brown.
